To 18 ports; the busiest crossings are to Waren (4 hours), Serui (5 hours 45 minutes), Biak (Mokmer) (39 hours, once a week), Manokwari (10 hours, four times a month), Sorong (24 hours, four times a month), Ujung (Surabaya) (4½ days, four times a month), Jayapura (22 hours) and Makassar (3 days, three times a month).